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A circuit whose external resistance R is fed from a battery consisting of N cells.

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A circuit whose external resistance R is fed from a battery consisting of N cells. Each of the cells has an e.m.f. ε0 and an internal resistance r0. The battery consists of similar series-connected groups. The groups consist of cells connected in parallel. Find the number of groups n and the number of cells m in each group to obtain largest current. 

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Answer:

Explanation:

The resistance of the group is r0/m, the number of groups is n = N/m, the resistance and e.m.f. of the battery are

 

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